24S I December, 



There is just one more circumstance I may mention regarding tbe 

 Zarcea larva, and that is, that at all stages pressure causes it to eject a 

 clear liquid, apparently from the spiracles or that neighbourhood, which 

 appears as a row of clear beads along the side of the larva, and is not, 

 I should say, a mechanical result of the pressure, but a voluntary re- 

 sentment of it. 



Milford, Letterkenny, Ireland : 

 22«d Oct., 1883. 



A PEOPOSED AERANGEMENT OF THE BRITISH JASSIDM. 

 BY JAMES EDWABD8. 



In the Catalogue of Bi*itish Hemiptera published by the Ento- 

 mological Society of London, the Jassidce are divided into seven 

 genera. Three of these, namely, Gnathodus, Fieb., Graphocrcerus, 

 Thoms., and Doratura, J. Sahib., are intelligible, but the remainder 

 seem to be capable of some improvement in the definition of the 

 characters to be assigned to each, and the species to bo included 

 therein. So far as I can make out, most recent authors have agreed 

 that the genus Athysanus, Burm., is chiefly to be distinguished by the 

 suture of the elytra being straight throughout, not, or scarcely, over- 

 lapping at the apex, and the appendix to the membrane either entirely 

 wanting or extremely narrow ; but of the fifteen species given in the 

 Catalogue above quoted, only eight possess these characters, five of 

 the others having the elytra distinctly overlapping at the apex, and au 

 ample appendix to the membrane, while nervosus, Fall., pertains to 

 the genus Paramestis, Fieb., and canescens, D. and S., I propose to 

 treat as the type of a new genus of equal value with GrapliocrcBriis , 

 Thoms. The more important characters of this new genus are as 

 follows : 



GLTPTOCEFIIALUS, g. n. 



Broad, parallel-sided. Head, including the eyes, wider tliaii the pronottim. 

 Vertex sub-angularly produced, its length down the centre rather more than twice 

 that of the inner margin of the eye, its disc distinctly but shallowly punctured, the 

 interstices very finely scratched ; just within, and running parallel to, the anterior 

 margin is a distinct groove, and beyond this the surface is raised, and strongly rugose, 

 parallel to the anterior margin. Frons extremely finely punctured, with regular 

 rows of coarse punctures running parallel with its upper margin, especially in its 

 upper part. Length of the side margin of the frons below the antenna; a trifle 

 shorter than the clypeus. Lorse each as wide as the clypeus. Pronotum strongly 

 transvci'sely rugose, except near its anterior margin, its sides very short. Elytra {i) 



